Optics Japan 2002
Yan LIAWataru WATANABEAKazuyoshi ITOH
Photoinduced permanent gratings in polymethyl methacrylate with individual femtosecond laser pulse
Both relief gratings on the surface and refractive index gratings inside transparent polymethyl methacrylate have been written by two-beam interference of individual 130 fs laser pulse at 800 nm. A surface-relief grating is fabricated by the ablation and the diffraction efficiency of the first order can reach 20%. A volume grating inside the sample is formed by the photoinduced change in the refractive index. When one beam carries information, holographic data storage on the surface is demonstrated.
Optical Society Of Japan
An Affiliate of the Japan Society of Applied Physics